He said: "We're disappointed to lose but didn't do enough when it was 1-1 and when we had the extra man. We lacked creativity and the sharpness in our passing and should have at least done enough to draw.

"It was a hostile environment but nothing you don't expect from a local derby and when you've got a manager up against his old club. The ref dealt with the one major incident - I've not seen it but I'm told it was correct - but we didn't do enough to get a point we should have got and it's also disappointing that a mistake gave them their second goal.

Skipper Curtis Davies was carried off just before half-time to add to Derby's woes further, the defender having only recently returned from a lengthy spell out.

Lampard added: "It's his achilles and could be a bad one - it didn't sound good or look good. I fear for him a bit but we'll have a closer look at it and hopefully have more of an idea tomorrow."